单词	catagen
释义	catagen noun cat·​a·​gen ˈka-tə-ˌjen  : a short transitional phase of the hair growth cycle between anagen and telogen that usually lasts between 10 to 20 days and during which the lower portion of the hair follicle regresses and hair growth ends In catagen, the hair follicle stops producing the fiber and regresses, shrinking dramatically. Damaris Christensen Word History Etymology cata- + -gen First Known Use 1926, in the meaning defined above Medical Definition catagen noun cat·​a·​gen ˈka-tə-ˌjen  : a short transitional phase of the hair growth cycle between anagen and telogen that usually lasts between 10 to 20 days and during which the lower portion of the hair follicle regresses and hair growth ends Anagen is followed by a regressive stage called catagen, of about two to three weeks, then a resting stage, telogen, of about three months. C. Claiborne Ray In catagen, the hair follicle stops producing the fiber and regresses, shrinking dramatically. Damaris Christensen
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